“Declaring always, as it is hereby expressly provided and declared, that it shall not be competent to, nor in the power of the said Henry Bell, or his foresaids, to subfeu, sell, or dispose of any part of the said piece of ground hereby feued out, or buildings to be erected thereon, to be holden of him or his foresaids, or of any other interjected superiors; but allenarly, to be holden of and under the said Sir James Colquhoun and his foresaids, in all time coming; without prejudice, nevertheless, to the said Henry Bell, or his foresaids, to grant securities upon the foresaid property, or to exercise any other right of ownership which may not be inconsistent with the manner of holding hereby prescribed.”